1 // RUN: %clang_cc1 -std=c++2a -verify %s 2 3 auto l1 = [] (auto x) requires (sizeof(decltype(x)) == 1) { return x; }; 4 // expected-note@-1{{candidate template ignored: constraints not satisfied [with x:auto = int]}} 5 // expected-note@-2{{because 'sizeof(decltype(x)) == 1' (4 == 1) evaluated to false}} 6 7 auto l1t1 = l1('a'); 8 auto l1t2 = l1(1); 9 // expected-error@-1{{no matching function for call to object of type '(lambda at}} 10 11 auto l2 = [] (auto... x) requires ((sizeof(decltype(x)) >= 2) && ...) { return (x + ...); }; 12 // expected-note@-1{{candidate template ignored: constraints not satisfied [with x:auto = <char>]}} 13 // expected-note@-2{{candidate template ignored: constraints not satisfied [with x:auto = <int, char>]}} 14 // expected-note@-3 2{{because 'sizeof(decltype(x)) >= 2' (1 >= 2) evaluated to false}} 15 16 auto l2t1 = l2('a'); 17 // expected-error@-1{{no matching function for call to object of type '(lambda at}} 18 auto l2t2 = l2(1, 'a'); 19 // expected-error@-1{{no matching function for call to object of type '(lambda at}} 20 auto l2t3 = l2((short)1, (short)1);